This is the third time I’m posting about the testing of my D800 autofocus system. The first time was not long after I purchased it, just to see if it had the problem. I found that it did have the problem, and I sent it to Nikon for repair. When the camera came back, I tested it again. Initially I thought it may have been fixed, but further testing showed there was still a problem. During this time, I also purchased LensAlign and FocusTune to help me more accurately fine tune my lenses and camera, but also to help me quantify the results. When I tested my lenses, I noticed that the recommended fine tune values for three of my five...

Update April 1, 2013: Testing after the second repair attempt by Nikon is now online here: http://photokaz.com/2013/04/nikon-d800-autofocus-repair-testing-the-sequel/ Update January 20, 2013: Initial testing showed changes to the focus performance and I thought the slight softness in some shots could be fixed with fine tuning. After more testing, I could not get consistently sharp results from fine tuning. I had to set my fine tuning for the Nikkor 24-70 f/2.8 lens to +20 and that still didn’t result in good performance. My AFS 50mm f/1.8 and AFD 80-200 f/2.8 lenses also had to have +20 of fine tuning. I dropped off my camera and the...

Update April 1, 2013: Testing after the second repair attempt by Nikon is now online here: http://photokaz.com/2013/04/nikon-d800-autofocus-repair-testing-the-sequel/ Update January 20, 2013: Initial testing showed changes to the focus performance and I thought the slight softness in some shots could be fixed with fine tuning. After more testing, I could not get consistently sharp results from fine tuning. I had to set my fine tuning for the Nikkor 24-70 f/2.8 lens to +20 and that still didn’t result in good performance. My AFS 50mm f/1.8 and AFD 80-200 f/2.8 lenses also had to have +20 of fine tuning. I dropped off my camera and...